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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Male Siphlonurus (Gray Drake) Mayfly Spinner Pictures

Egg-laying females of this species were the most noticeable insect over the water at dusk on this small trout stream in Wisconsin's Blue Hills. I caught several of them and photographed one, but this was the only male, netted in mid-air mated to one of the females.

Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Lateral view of a Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Dorsal view of a Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Artistic view of a Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Ventral view of a Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin
Male Siphlonurus (Siphlonuridae) (Gray Drake) Mayfly Spinner from Devil's Creek in Wisconsin

This mayfly was collected from Devil's Creek in Wisconsin on June 14th, 2021 and added to Troutnut.com by Troutnut on June 21st, 2021.


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Male Siphlonurus (Gray Drake) Mayfly Spinner Pictures

Collection details
Location: Devil's Creek, Wisconsin
Date: June 14th, 2021
Added to site: June 21st, 2021
Author: Troutnut
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